Commit | Line | Data |
---|---|---|
10e26723 DM |
1 | #include <linux/sched.h> |
2 | #include <linux/stacktrace.h> | |
3 | #include <linux/thread_info.h> | |
4 | #include <asm/ptrace.h> | |
5 | ||
6 | void save_stack_trace(struct stack_trace *trace, struct task_struct *task) | |
7 | { | |
8 | unsigned long ksp, fp, thread_base; | |
9 | struct thread_info *tp; | |
10 | ||
11 | if (!task) | |
12 | task = current; | |
13 | tp = task_thread_info(task); | |
14 | if (task == current) { | |
15 | flushw_all(); | |
16 | __asm__ __volatile__( | |
17 | "mov %%fp, %0" | |
18 | : "=r" (ksp) | |
19 | ); | |
20 | } else | |
21 | ksp = tp->ksp; | |
22 | ||
23 | fp = ksp + STACK_BIAS; | |
24 | thread_base = (unsigned long) tp; | |
25 | do { | |
26 | struct reg_window *rw; | |
27 | ||
28 | /* Bogus frame pointer? */ | |
29 | if (fp < (thread_base + sizeof(struct thread_info)) || | |
30 | fp >= (thread_base + THREAD_SIZE)) | |
31 | break; | |
32 | ||
33 | rw = (struct reg_window *) fp; | |
34 | if (trace->skip > 0) | |
35 | trace->skip--; | |
36 | else | |
37 | trace->entries[trace->nr_entries++] = rw->ins[7]; | |
38 | ||
39 | fp = rw->ins[6] + STACK_BIAS; | |
40 | } while (trace->nr_entries < trace->max_entries); | |
41 | } |